BiWu.AiClaude Sonnet API Pricing
Anthropic publishes official API prices for 2 Claude Sonnet models: Claude Sonnet 4.6 and Claude Sonnet 5. Input costs from $2 to $3 and output from $10 to $15 per 1M tokens. The lowest output price is Claude Sonnet 5 at $10; the highest is Claude Sonnet 4.6 at $15.
Prices checked Oct 10, 2026
Models
2
Lowest output / 1M
$10
Claude Sonnet 5
Unit
Per 1M tokens
Prices checked
Oct 10, 2026
Claude Sonnet API prices by model
Official prices per 1 million tokens from Anthropic's pricing page. Open a model for every provider and plan we track.
| Model | Input | Output | Cached input | Context window |
|---|---|---|---|---|
| Claude Sonnet 4.6 | $3 | $15 | $0.30 | — |
| Claude Sonnet 5 | $2 | $10 | $0.20 | — |
Claude Sonnet API pricing FAQ
How much does the Claude Sonnet API cost?
Anthropic's official API charges from $2 to $3 per 1M input tokens and from $10 to $15 per 1M output tokens across the 2 models listed here. Prices checked Oct 10, 2026.
What is the cheapest Claude Sonnet API model?
Claude Sonnet 5 has the lowest output price: $2 per 1M input tokens and $10 per 1M output tokens.
Is cached input cheaper on the Claude Sonnet API?
Yes. 2 of the 2 models listed here have a lower cached-input price. For example, Claude Sonnet 4.6 charges $0.30 per 1M cached input tokens instead of $3.
Related pricing
BiWu.Ai lists public API prices from official pricing pages for reference and does not sell API access. Long-context, batch and priority rates can differ, and prices can change without notice. Check Anthropic's pricing page before you build on it.